Am starting to keep freshwater fish again after not keeping any fish since being a teenager and have a new 60lt tank,got the tank washed it out washed through the gravel before adding and built up new filter and everything else and then added water after doing so i then added API stress coat and API stress zyme and left for a few days before taking and getting water-sample tested at local store.Chlorine and ammonia levels are no problem but only thing giving me bother at this stage is the NITRATE level being too high.Was going to empty tank and rewash all parts and start again but high levels might have to do with local water,is there any product to help reduce levels and was also told introducing live plants to tank may help reduce high levels?

Yes, I agree with Fantailer, plants do help. I'm not sure if it'll make any noticeable difference. The only way I know to keep the nitrates down is with water changes. Make sure you're changing a large enough volume to make a difference. Changing too little is actually bad.

Maybe change 25% weekly, depending on how many fish you have, and every once in a while you may have to do a larger water change.

I can't see what kind of fish or how many you have in the tank anywhere? Would you please tell us that? The most usual reason to high nitrates are:1. Too many fish2. Not enough filtration3. Overfeeding4. Inadequate maintenance

The solution for now may be to change about 50% of the water every week to prevent the nitrates from building up.